Typo fixes in comments

Correct spelling of words in source code comments.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>

docs/storage/driver/gcs/gcs.go

@@ -285,7 +285,7 @@ func (d *driver) WriteStream(context ctx.Context, path string, offset int64, rea
 	if err != nil {
 		return nn, err
 	}
-	// wc was closed succesfully, so the temporary part exists, schedule it for deletion at the end
+	// wc was closed successfully, so the temporary part exists, schedule it for deletion at the end
 	// of the function
 	defer storageDeleteObject(gcsContext, d.bucket, partName)
 

docs/storage/driver/storagedriver.go

@@ -133,7 +133,7 @@ func (err InvalidOffsetError) Error() string {
 }
 
 // Error is a catch-all error type which captures an error string and
-// the driver type on which it occured.
+// the driver type on which it occurred.
 type Error struct {
 	DriverName string
 	Enclosed   error

docs/storage/driver/testsuites/testsuites.go

@@ -158,7 +158,7 @@ func (suite *DriverSuite) TestInvalidPaths(c *check.C) {
 
 	for _, filename := range invalidFiles {
 		err := suite.StorageDriver.PutContent(suite.ctx, filename, contents)
-		// only delete if file was succesfully written
+		// only delete if file was successfully written
 		if err == nil {
 			defer suite.deletePath(c, firstPart(filename))
 		}

docs/storage/paths.go

@@ -48,7 +48,7 @@ const (
 // The storage backend layout is broken up into a content-addressable blob
 // store and repositories. The content-addressable blob store holds most data
 // throughout the backend, keyed by algorithm and digests of the underlying
-// content. Access to the blob store is controled through links from the
+// content. Access to the blob store is controlled through links from the
 // repository to blobstore.
 //
 // A repository is made up of layers, manifests and tags. The layers component
@@ -301,7 +301,7 @@ type manifestRevisionLinkPathSpec struct {
 
 func (manifestRevisionLinkPathSpec) pathSpec() {}
 
-// manifestSignaturesPathSpec decribes the path components for the directory
+// manifestSignaturesPathSpec describes the path components for the directory
 // containing all the signatures for the target blob. Entries are named with
 // the underlying key id.
 type manifestSignaturesPathSpec struct {
@@ -311,7 +311,7 @@ type manifestSignaturesPathSpec struct {
 
 func (manifestSignaturesPathSpec) pathSpec() {}
 
-// manifestSignatureLinkPathSpec decribes the path components used to look up
+// manifestSignatureLinkPathSpec describes the path components used to look up
 // a signature file by the hash of its blob.
 type manifestSignatureLinkPathSpec struct {
 	name      string